python3-graphviz: upgrade 0.19.2 -> 0.20

Changelog:
==========
- Add keyword-only neato_no_op argument to .render(), .pipe(), and stand-alone
  graphviz.render() and graphviz.pipe().
- When building a Graph or Digraph, warn about an expected DOT syntax error in
  rendering when passing a string that ends with an odd number of backslashes
  (e.g. invalid dot.node('spam', label='\\') instead of correct ..., label=r'\\'
  for a node labled as a backslash).
- Increase visibility of graphviz.escape() in the documentation.

Signed-off-by: Xu Huan <xuhuan.fnst@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-graphviz_0.20.bb

@@ -0,0 +1,16 @@
+DESCRIPTION = "Graphviz protocol implementation"
+HOMEPAGE = "https://graphviz.readthedocs.io/en/stable/"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=951dd0868a9606c867ffda0ea3ea6da2"
+
+SRC_URI[sha256sum] = "76bdfb73f42e72564ffe9c7299482f9d72f8e6cb8d54bce7b48ab323755e9ba5"
+
+inherit pypi setuptools3
+
+PYPI_PACKAGE_EXT = "zip"
+
+RDEPENDS:${PN} += " \
+    ${PYTHON_PN}-logging \
+"
+
+BBCLASSEXTEND = "native nativesdk"